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More Mining Engineering Questions
Out of available Surveyors how many shall be appointed by the underground mine Manager for the preparation and maintenance of plans required under new coal mine regulation 2017?
Coal tar, . . . . . . . .% yeild on coal.
The unit bar used by the metrologists to measure the atmospheric pressure is equivalent to
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An exhaust fan attached to an evasee of 18 m 2 cross-sectional area at the outlet circulates 150 m 3 /s of air at the pressure of 1000 Pa in a mine ventilation system. The ratio of the inlet to outlet area of the evasee is 1 : 4 and the density of air is 1.2 kg/m 3 . The quantity of air circulated in the mine in absence of evasee is 120 m 3 /s. The eva see efficiency in % is